<script setup>
import './category.vue'
</script>

<template>
  <div>
    <el-switch v-model="draggable" active-text="开启拖拽" inactive-text="关闭拖拽"></el-switch>
    <el-button v-if="draggable" @click="batchSave">批量保存</el-button>
    <el-button  @click="batchDelete">批量删除</el-button>
    <el-tree :data="menus" :props="defaultProps" @node-click="handleNodeClick" :expand-on-click-node="false"
             show-checkbox node-key="catId" :draggable="draggable" :allow-drop="allowDrop" @node-drop="handleDrop"
             :default-expanded-keys="expandkey" ref="menuTree">
    <span class="custom-tree-node" slot-scope="{node, data}">
    <span>{{ node.label }}</span>
    <span>
      <el-button v-if="node.level <= 2" type="text" size="mini" @click="()=>append(data)">Append</el-button>
      <el-button type="text" size="mini" @click="()=>edit(data)">Edit</el-button>
      <el-button v-if="node.childNodes.length === 0" type="text" size="mini"
                 @click="()=>remove(node,data)">Delete</el-button>
    </span>
      </span>
    </el-tree>
    <el-dialog :title="title" title="收货地址" :visible.sync="dialogVisible"

               :close-on-click-modal="false">
      <el-form :model="category">
        <el-form-item label="分类名称">
          <el-input v-model="category.name" autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item label="图标">
          <el-input v-model="category.icon" autocomplete="off"></el-input>
        </el-form-item>
        <el-form-item label="计量单位">
          <el-input v-model="category.productUnit" autocomplete="off"></el-input>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="submitData">确 定</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
export default {
  components: {},
  props: {},
  data () {
    return {
      menus: [],
      defaultProps: {
        children: 'children',
        label: 'name'
      },
      expandkey: [],
      draggable: false,
      dialogVisible: false,
      category: {
        catId: null,
        name: '',
        parentCid: 0,
        catLevel: 0,
        sort: 0,
        showStatus: 1,
        icon: undefined,
        productUnit: undefined
      },
      dialogType: undefined,
      title: null,
      maxLevel: 0,
      updateNodes: [],
      pCid: []
    }
  },
  methods: {
    batchDelete () {
      let checkedNodes = this.$refs.menuTree.getCheckedNodes()
      let catIds = []
      console.log(checkedNodes)
      for (let i = 0; i < checkedNodes.length; i++) {
        catIds.push(checkedNodes[i].catId)
      }
      this.$confirm(`是否批量删除【${catIds}】数据?`, '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        this.$http({
          url: this.$http.adornUrl('/product/category/delete'),
          method: 'post',
          data: this.$http.adornData(catIds, false)
        }).then(({data}) => {
          this.$message.success('删除成功！')
          this.getMenus()
          console.log('remove... success..')
        })
      }).then(() => {
        this.$message.success('菜单删除成功')
        this.getMenus()
        console.log('取消操作...')
      }).catch(() => {
        console.log('删除异常...')
      })
    },
    getMenus () {
      // 获取数据列表
      this.$http({
        url: this.$http.adornUrl('/product/category/list/tree'),
        method: 'get'
      }).then(({data}) => {
        this.menus = data.data
        console.log('成功获取到树结构.....')
      })
    },
    handleNodeClick (data) {
      console.log(data)
    },
    remove (node, data) {
      var ids = [data.catId]
      this.$confirm(`是否删除【${data.name}】数据?`, '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        this.$http({
          url: this.$http.adornUrl('/product/category/delete'),
          method: 'post',
          data: this.$http.adornData(ids, false)
        }).then(({data}) => {
          this.$message.success('删除成功！')
          this.getMenus()
          console.log('remove... success..')
          this.expandkey = [node.parent.data.catId]
        })
      }).then(() => {
        console.log('取消操作...')
      }).catch(() => {
        console.log('删除异常...')
      })
      console.log('remove...', node, data)
    },
    append (data) {
      this.dialogType = 'add'
      this.dialogVisible = true
      this.title = '添加分类'
      console.log('..................', data)
      this.category.parentCid = data.catId
      this.category.catLevel = data.catLevel * 1 + 1
      console.log(this.category)
      // 重置表单
      this.category.catId = null
      this.category.productUnit = undefined
      this.category.name = undefined
      this.category.icon = undefined
      this.category.showStatus = 1
      this.category.sort = 0
    },

    // 修改，回显最新数据
    edit (data) {
      this.title = '修改分类'
      this.dialogType = 'edit'
      this.dialogVisible = true
      this.$http({
        url: this.$http.adornUrl(`/product/category/info/${data.catId}`),
        method: 'get'
      }).then(({data}) => {
        this.category = data.data
        this.category.name = data.data.name
        this.category.catId = data.data.catId
        this.category.icon = data.data.icon
        this.category.productUnit = data.data.productUnit
        this.category.parentCid = data.data.parentCid
        this.category.catLevel = data.data.catLevel
        this.showStatus = data.data.showStatus
        this.sort = data.data.sort
      })
    },
    addCategory () {
      console.log('....')
      this.$http({
        url: this.$http.adornUrl('/product/category/save'),
        method: 'post',
        data: this.$http.adornData(this.category, false)
      }).then(({data}) => {
        this.$message.success('保存成功！')
        console.log(this.category)
        this.dialogVisible = false
        this.getMenus()
        this.expandkey = [this.category.parentCid]
      })
    },
    submitData () {
      if (this.dialogType === 'add') {
        this.addCategory()
      }
      if (this.dialogType === 'edit') {
        this.editCategory()
      }
    },
    editCategory () {
      this.title = '修改分类'
      var {catId, name, icon, productUnit} = this.category
      this.$http({
        url: this.$http.adornUrl('/product/category/update'),
        method: 'post',
        data: this.$http.adornData({catId, name, icon, productUnit}, false)
      }).then(({data}) => {
        this.$message.success('菜单修改成功！')
        console.log(this.category)
        this.dialogVisible = false
        this.getMenus()
        this.expandkey = [this.category.parentCid]
      })
    },
    // 当前结点， 目录结点， 关系（里面， 前面， 后面）
    allowDrop (draggingNode, dropNode, type) {
      this.countNodeLevel(draggingNode)
      console.log('深度:', this.maxLevel)
      let deep = Math.abs(this.maxLevel - draggingNode.level) + 1
      if (type === 'inner') {
        return (deep + dropNode.level) <= 3
      } else {
        return (deep + dropNode.parent.level) <= 3
      }
    },
    handleDrop (draggingNode, dropNode, type) {
      let pCid = 0
      let siblings = null
      if (type === 'before' || type === 'after') {
        pCid = dropNode.parent.data.catId === undefined ? 0 : dropNode.parent.data.catId
        siblings = dropNode.parent.childNodes
      } else {
        pCid = dropNode.data.catId
        siblings = dropNode.childNodes
      }
      this.pCid.push(pCid)
      for (let i = 0; i < siblings.length; i++) {
        if (siblings[i].data.catId === draggingNode.data.catId) {
          // 如果便利的是当前的节点
          let catLevel = draggingNode.level
          if (siblings[i].level !== draggingNode.level) {
            // 当前层级发生变化
            catLevel = siblings[i].level
            // 修改子节点的信息
            this.updateChildNodeLevel(siblings[i])
          }
          this.updateNodes.push({catId: siblings[i].data.catId, sort: i, parentCid: pCid, catLevel: catLevel})
        } else {
          this.updateNodes.push({catId: siblings[i].data.catId, sort: i})
        }
      }
    },
    updateChildNodeLevel (node) {
      if (node.childNodes.length > 0) {
        for (let i = 0; i < node.childNodes.length; i++) {
          var cNode = node.childNodes[i].data
          this.updateNodes.push({catId: cNode.catId, catLevel: node.childNodes[i].level})
          this.updateChildNodeLevel(node.childNodes[i])
        }
      }
    },
    countNodeLevel (node) {
      if (node.childNodes != null && node.childNodes.length > 0) {
        for (let i = 0; i < node.length; i++) {
          if (node.childNodes[i].level > this.maxLevel) {
            this.maxLevel = node.childNodes[i].level
          }
          this.countNodeLevel(node.childNodes[i])
        }
      }
    },
    batchSave () {
      this.$http({
        url: this.$http.adornUrl('/product/category/update/sort'),
        method: 'post',
        data: this.$http.adornData(this.updateNodes, false)
      }).then(({data}) => {
        this.$message({
          message: '顺序修改成功！',
          type: 'success'
        })
        this.maxLevel = 0
        this.updateNodes = []
        this.getMenus()
        this.expandkey = this.pCid
        // this.pCid = 0
      })
    }
  },

  created () {
    this.getMenus()
  }
}
</script>

<style scoped lang="scss">

</style>
